/Engine/Plugins/Editor/SequencerAnimTools/Source/SequencerAnimTools/Public/MotionTrailTool.h
Allow the Tool to do any custom screen space drawing
virtual void DrawHUD ( [FCanvas](API\Runtime\Engine\FCanvas) * Canvas, [IToolsContextRenderAPI](API\Runtime\InteractiveToolsFramework\IToolsContextRenderAPI) * RenderAPI )